Estoril, 1956. Prince Juan Carlos de Borbon lived a passionate romance with Mafalda Cornaro, the new young face of the Maison Christian Dior. But one fateful day, Prince Alfonso de Borbon received a fatal shot coming from the gun of his older brother Juan Carlos while playing with him in the residence of the Count of Barcelona in the exile.

To investigate this incident, the governments of Salazar and Franco started the Operation Giralda. Action, suspense, and romance mix in this fast-paced novel in which the greatest expert in the House of Bourbons shows all of his knowledge about the King of Spain.